Plane.



E. A. SGHADE.

PPPP B. 0000000000000000000000000 9.

955,557. Patented Apr. 19, 1910.

EEEEEEEEEEEEE l.

M'WHIIE E. A. SOHADE.

PLANE. APPLICATION FILED NOV. 4, 1909.

Patented Apr. 19, 1910.

2 8HEBTS-SHEBT 2.

wi/bneooco co Pubmumocmwzxs. wAswNu UNITED STATES PATENT OFFICE.

EDMUND A. SCHADE, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO STANLEY RULE& LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

PLANE.

To all whom "it may concern:

Be it known that I, EDMUND A. Sermon, a citizen of the United States,residing at New Britain, county of Hartford, State of Connecticut, haveinvented certain new and useful Improvements in Planes, of which thefollowing is a full, clear, and exact description.

My invention relates to improvements in planes.

The object of the invention is to provide a simple and effective meansto facilitate the adjustment of the plane frog to and fro for the properpositioning of the cutting edge of the plane iron in the throat of theplane.

In the drawingsFigure 1 is a longitudinal section of a plane takenapproximately on the plane of the line a2:c of Fig. 2, certain partsbeing shown in elevation; Fig. 2 is a cross section of the body of theplane on the line g -g Fig. 1, showing a portion of the plane frog inelevation; Fig. 3 is a view of the under side of the forward part of theplane frog; Fig. 1 is a plan view of that part of the body of the planewhich supports the frog.

1 represents the sole of the plane body; 2 the throat therein, and 33are the cheek pieces. Immediately to the rear of the throat 2 is asmooth bearing support 5 designed to receive a cooperating bearingsurface 7 at the forward end of the frog 6. Still farther to the rear ofthe throat 2 is an elevated bearing support 8, the rear portion of whichis constructed to receive and support a cooperating bearing surface 9 onthe frog. The bearing supports 5-8 are spaced apart so that the frogwill be supported at two different points.

10 is a longitudinally arranged guide and strengthening rib on the upperside of the sole of the plane extending rearwardly from a point at ornear the throat 2.

11 is a groove or slot in the under side of the frog, the side walls ofwhich are arranged to take a bearing upon the side walls of the rib 10whereby said rib 10 will serve to hold the frog in correct alinement andguide the frog in its movement to and fro, thereby avoiding any twist orlateral displacement of the frog as it is being adjusted.

1212 are longitudinal slots in the frog, parallel with the groove 11 butsomewhat to the rear of the same.

Specification of Letters Patent.

Application filed November 4, 1909.

These slots are ar- Patented Apr. 19, 1910.

Serial No. 526,204.

ranged to receive clamping screws 1313 respectively. The lower ends ofthese clamp ing screws take into threaded openings 1 11 1 respectivelyin the sole of the plane which openings are arranged forward of the mostelevated portion of the support 8.

15 is an adjusting screw carried by the sole of the plane at the rear ofand below the bearing 8. This screw has a groove 15 arranged to receivea yoke 16, which is secured to the rear of the frog. When the screw 15is moved to and fro, it will impart a corresponding movement to thefrog.

17 is the plane iron or cutter held in place on the frog by the usualcap 18.

In operation, the frog is secured in place by means of the screws13-13*-, the same being set down snugly so as to prevent accidental orunintentional displacement of the frog. The strain of these screws, asshown, comes upon an intermediate part of the frog between the supports58. The plane iron and cap are then applied. The adjustment of the planeiron for the purpose of project-- ing or retracting the cutting edge ofthe same may be accomplished in any well known manner, that beingimmaterial to my invention. If it is found that the position of theplane iron, fore and aft, in the throat 2 should be changed, it ismerely necessary to move the screw 15 in the proper direction and to thedesired extent, producing thereby the desired movement and adjustment ofthe frog. If by chance (and it is practically impossible to prevent it)one of the screws 13 or 13 is screwed down more tightly than the other,it is obvious that any movement to and fro of the frog would tend totwist the same upon its bearing supports by reason of an abnormal dragon one side of the center line. The provision of the guide rib 10 whichfits between the guide Walls of the groove 11 will prevent thisdisplacement. I have found that even though the screws 13 13 be screweddown very tightly nevertheless adjustment of the frog by means of thescrew 15 alone may be readily effected, due doubtless to the smoothbearing supports 5-8 and the co-acting smooth bearing surfaces 7-4) andto the fact that there is sufficient elasticity or spring in the frogalong the line of the clamping screws 13-18 to prevent the absolutelocking of the frog. While the clamping engagement of the screws 1313 isnot suflicient to prevent the intentional adjustment of the frog by thescrew 15, said clamping engagement is quite sufiicient to preventaccidental or unintentional displacement of the frog, particularly as inthis respect the guiding rib 10 and the adjusting screw 15 cooperatewith the clamping screws 13 13 in the retention of the frog in any ofits adjusted positions.

I am aware that heretofore separated frog supports, adjusting screws,clamping screws and reinforcing ribs are old but in the present instanceI have added a new function to the reinforcing rib, viz., the guidingfunction, and have thereby produced a means for permitting the quick andaccurate adjustment of a plane frog, which means is vastly more simpleand far more effective than any adjusting means heretofore produced inthat it eliminates certain parts and operations heretofore regarded asessential, simplifies the act of adjusting, and guarantees a straightline movement of the frog to and fro. In devices of this character it.is desirable that the plane iron should be in position when theadjustment of the frog is being effected. By my improvement this ispossible.

It is obvious that the number of guiding ribs 10 employed may beincreased, but one is sutlicient, and is, indeed, preferable. It isobvious that the rib 10 may engage the side walls of the groove 11throughout their entire length, but in the preferred form it isdesirable to cut back or narrow the top of the rib to the rear of itsfront end, so that the active guiding part of the rib is comparativelyshort and close to the throat. By this arrangement a slight lateraladjustment of the extreme rear end of the frog may be had in assemblingthe plane, only a very slight adjustment at this point. ever beingrequired (if at all) to secure the accurate positioning of the frog onthe supports 5 and S relatively to the throat.

In practice I accomplish the proper positioning of the frog on itssupport in the following manner: Before tightening up the screw whichholds the fork in its place, I place the forward end of the frog in itsproper position upon the rib and then swing the rear end of the frog toright or to left may be necessary to secure perfect alinement betweenthe frog and center line of the plane bottom. During this swingingmovement the fork l6 (loose on its own fastening screw) engages thecircular groove 15 hen perfect alinement is secured, I force home thescrew which holds the fork, there by securing all the parts incooperative combination. In this Way the fore and aft movement of thefrog on the plane bottom is made to be in perfect alinement throughout.hen the fore and aft movement is secured in this manner the front edgeof the frog is always parallel. to the throat of the plane. This methodis found to be advantageous in practice, although it is evident thatwith suflicient pains the proper cooperative relations of the frog andplane bottom may be secured even if the fork were firmly fastened in thefirst instance.

It is evident that yoke 16 and the adjusting screw 15 may be reversed,that is to say, the yoke may be secured by a screw to the bottom of theplane and the adjusting screw be inserted in the rear of the frog, thesetwo elements cooperating with each other in the same way, whichever oneof them may be uppermost. Likewise the fork may be cast integral withthe portion of which it is a part.

hat I claim is:

1. A bench plane comprising a body portion having a transverse throat inthe sole portion thereof, a frog support to the rear of said throat, afrog mounted thereon for adjustment to and fro, means for frictionallyclamping said frog to said support, a combined guide and operating meanslocated at and accessible at the rear of the frog for moving said frogon said support longitudinally of the plane body, and a guiding rib andgroove engagement between said frog and support adjacent to the throatof the plane whereby said frog will be prevented from twisting out ofcorrect alinement relatively to the throat as it is adj usted to andfro.

2. A bench plane comprising a plane body having a transverse throat inits sole por tion, a frog support, a frog mounted thereon, means forfrictionally clamping said frog to said support on both sides of thecentral vertical plane thereof, and intermediate its forward and rearends a single positively operating means for adjusting said frog on saidsupport longitudinally of said plane, and a guiding rib and grooveengagement between said frog and support at the forward end of the frogand adjacent to the throat of the plane whereby the said singleadjusting means will move the frog parallel with said central verticalplane regardless of difference of degree of clamping between saidclamping means.

EDMUND A. SCI-IADE.

lVitnesses WI J. 01mm, I. IV. CHAPMAN.

